Cache failover to LOAD_PREFERRING_CACHE if network response suggests offline.

net/base/load_flags_list.h

Index: net/base/load_flags_list.h
diff --git a/net/base/load_flags_list.h b/net/base/load_flags_list.h
index 635ce7999f924666b1724b1027924b2229cc5d89..49c1077c1c9d28cacd96d18ca645450df8c55f72 100644
--- a/net/base/load_flags_list.h
+++ b/net/base/load_flags_list.h
@@ -114,3 +114,8 @@ LOAD_FLAG(DO_NOT_PROMPT_FOR_LOGIN, 1 << 25)
 // explicit user action. This can be used as a hint to treat the
 // request with higher priority.
 LOAD_FLAG(MAYBE_USER_GESTURE, 1 << 26)
+
+// Indicate that if the request fails at the network level in a way that
+// indicates the source is unreachable, the request should fail over
+// to as if LOAD_PREFERRING_CACHE had been set.
+LOAD_FLAG(CACHE_RETURN_IF_OFFLINE, 1 << 27)

[rvargas (doing something else), 2013/03/05 02:58:19]

It would be nice if this were beside the other cache flags, but that would screw
the net-internals page when looking at older versions. Sad that we have that
unintended dependency.

[rvargas (doing something else), 2013/03/05 02:58:19]

FROM_CACHE_IF_OFFLINE?

[Randy Smith (Not in Mondays), 2013/03/05 23:16:14]

Agreed.  I don't see a way around the problem, though :-{.

[Randy Smith (Not in Mondays), 2013/03/05 23:16:14]

Done.